Fire Release (火遁, Katon, English TV: Fire Style) is one of the basic elemental nature transformations. It is performed by moulding superheated chakra inside the stomach before releasing it via the lungs and mouth. There are also variants to this in the form of some mediums such as the use of gun powder, explosive tags and chakra flow into a weapon.[1][2][3]

Commonly affiliated with the Tiger hand seal, Fire Release consists of mid to long-ranged offensive techniques that cause combustive and explosive damage.[4] The chakra nature is common among shinobi of Konohagakure in the Land of Fire with the Uchiha clan holding a natural affinity for it.[5]Amaterasu is stated to be the highest level of fire nature transformation.[6]

Fire Release also possesses an advanced variant known as Blaze Release which is made possible through the manipulation of Amaterasu.

Trivia

Fire Release parallels the real-life ninja art "katon-no-jutsu". One example of real-life katon-no-jutsu is Hitsuke: the practice of distracting guards by starting a fire away from the ninja's planned point of entry.